Open Sonic is a free open-source game based on the "Sonic the Hedgehog" universe. It introduces a different style of gameplay called cooperative play, in which it's possible to control 3 characters simultaneously. It works on Windows, Linux and MacOSX

"Tux, of Math Command" is a math drill game starring Tux, the Linux Penguin. Lessons are included from simple number typing through addition, subtraction, multiplication, and division of positive and negative numbers. It is intended for kids ~4-10.

SpeedSim is an OGame (ogame.org) combat simulator. It has lots of additional features like BestWorst-Case calculation, multiple simulations, it supports skinning and other useful things. This is also the project page of QtSim (SpeedSim for Linux)

jose is a graphical Chess tool.
You can store chess games in a database.
You can view and edit games (including variations and comments).
You can play against a plugged-in chess engine and use it for analysis.
Features 3D board view.

PC conversion of famous karaoke game - Singstar. UltraStar allows a computer to evaluate how good you are when you sing by analyzing your voice pitch. Sing your favourite songs and see how you improve.

This is a first attempt to create a game in OpenGL with SFML. It is a game for two players, flying with ships in a two-dimensional space setting, governed by the laws of gravity. There are several game modes and a lot of weapons.

Java Open Chess is a project written in Java in NetBeans IDE. There is possibility to play for 2 players on local computers and via network connection. There is no option for now to play against computer. This functionality will be implemented soon.
ATTENTION: Requires Java 1.7 or higher!

Pauker is a generic flashcard program written in Java. It uses an innovative combination of ultra-shortterm, shortterm and longterm memory. You can use it to learn all the things you never want to forget, like vocabularies, capitals, important dates,